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BENJAMIN GARVIN AND R. .L PETTIBGNE, OF OSHKOSH,` WISCONSIN. Letteralatent No. 71,604, dated December 3, 1867.

IMPROVEMENT IN FEED-WATER HEATERS FOR LOOMOTIVES.

TO ALL WHO IT MAY .CONOERN Be it known that we, B. Gauvin and R.. J. Pn'rTIBoNE, of Oshkosh, in the State of Wisconsin, have invented a Water-Heater for Locomotives; and we do hereby declare that the following is a full, clear, and exact description ofthe same, reference being had to the accompanying drawings, and letters marked thereon, making a part; of this description, in which- Figure 1 is an elevation of our heater.

Figure 2, a sectional elevation of the same.

Figure 3, a plan view, showing the under side of the steam-chamber and the pipes.`

The nature of' our invention consists in arranging a series ot' pipes in the smoke-stack, communicating withl a double steam-chamber, the pump, and feed-pipes, and is designed to heat water by means of the exhaust steam before it enters the boiler. We know that feed-water heaters have been used both for stationary engines and those -which are portable, and therefore do not claim the use of exhaust steam foihheating feed-water.

In order to give a correct understanding of our invention, we have marked corresponding parts with similar letters, and will now give a detailed description.

I-I represents the collar which is usually attached to the common locomotive-boiler. A double steam-chamber, B C, is covered with a concave cap, A, a little smallerthan the smoke-stack J', shown by red lines in g. 1, for the purpose of giving asnitable draught, and is supported by means of rods, Gn G G, rigidly attached to said collar, and to the steam-chambers above mentioned. A series of pipes, F, is made to enter the chamber- C, tig. 2, one pipe, F, same figure, being arranged to communicate with the upper chamber, B, by which means the water is made to enter all of the pipes and chambers, and thus become heated before enteringthe boiler. The pipe E is used to supply the heater, and the pipe D for supplying the boiler, said pipes being arranged, by `rmeans of screw-threads K K, soas to be attached to any common pipes, of suitable length, in the usual manner. It is not necessarythat there should be two chambers in order to heat water, nor is it materially essential that the inner pipes I, iig. 2, be -used, but.l the heater will have a much greater Surface to be acted upon when arranged as shown in the drawing.

The steam vcan be made to enter the pipe F, tig. 1, Aor any pipe communicating with the lupper chamber B. We use, in the construction ofthe heater, material similar to that used inithe manufacture of boilerstand secure the joints'and connect the pipes in the same manner.

' Having thus fully described our device, what we elaiu1,and desire to secure by Letters Patent, is The combination of the pipesE D and F F F, &c., steam-chambers B C, arranged inside of a smoke-stack and over the collar II, substantially as and for the purpose herein specified.

' BENJAMIN GARVIN,

R. J. PETTIBONE.

Witnesses:

G. R. LAMBERT, WILLIAM SPIRES. 

